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#include "faceController.h"
#include "collections.hpp"
#include "maths.h"
#include "modelFactoryMesh.h"
#include <glm/gtx/intersect.hpp>
void
FaceController::apply(ModelFactoryMesh & mesh, const StyleStack & parents, const std::string & names,
Shape::CreatedFaces & faces) const
{
std::stringstream nameStream {names};
std::for_each(std::istream_iterator<std::string>(nameStream), std::istream_iterator<std::string> {},
[&](const auto & name) {
applySingle(mesh, parents, name, faces);
});
}
void
FaceController::applySingle(ModelFactoryMesh & mesh, const StyleStack & parents, const std::string & name,
Shape::CreatedFaces & faces) const
{
auto controlledFaces {materializeRange(faces.equal_range(name))};
if (!type.empty() || !splits.empty()) {
faces.erase(name);
}
for (auto & [faceName, faceHandle] : controlledFaces) {
Shape::CreatedFaces newFaces;
for (const auto & [newFaceSuffix, splitDef] : splits) {
newFaces.merge(split(mesh, name + newFaceSuffix, faceHandle, *splitDef));
}
if (type == "extrude") {
newFaces.merge(extrude(mesh, name, faceHandle));
}
if (!newFaces.empty()) {
applyStyle(mesh, parents + this, newFaces);
for (const auto & [subFaceName, faceController] : faceControllers) {
faceController->apply(mesh, parents + this, subFaceName, newFaces);
}
faces.merge(std::move(newFaces));
}
else {
applyStyle(mesh, parents + this, faceHandle);
}
}
}
Shape::CreatedFaces
FaceController::extrude(ModelFactoryMesh & mesh, const std::string & faceName, OpenMesh::FaceHandle faceHandle) const
{
// get points
const auto baseVertices {materializeRange(mesh.fv_range(faceHandle))};
// create new vertices
const auto vertices
= baseVertices * [&mesh, mutation = getMatrix(), centre = mesh.calc_face_centroid(faceHandle)](auto && v) {
return mesh.add_vertex(centre + ((mesh.point(v) - centre) % mutation));
};
// get new faces names
const auto vertexCount = baseVertices.size();
std::vector<std::string> faceNames;
for (size_t idx {}; idx < vertexCount; ++idx) {
const auto next = (idx + 1) % vertexCount;
const auto existingEdge = mesh.find_halfedge(baseVertices[idx], baseVertices[next]);
faceNames.push_back(mesh.property(mesh.nameAdjFaceProperty, existingEdge));
}
// create new faces
mesh.delete_face(faceHandle);
Shape::CreatedFaces newFaces;
for (size_t idx {}; idx < vertexCount; ++idx) {
const auto next = (idx + 1) % vertexCount;
newFaces.emplace(mesh.add_namedFace(
faceNames[idx], baseVertices[idx], baseVertices[next], vertices[next], vertices[idx]));
}
newFaces.emplace(mesh.add_namedFace(faceName, vertices));
return newFaces;
}
enum class PlaneRelation { Above, Below, On };
Shape::CreatedFaces
FaceController::split(
ModelFactoryMesh & mesh, const std::string & name, OpenMesh::FaceHandle & fh, const Split & split) const
{
// Map face vertex handles to their relationship to the split plane
const auto vertices = materializeRange(mesh.fv_range(fh));
auto vertexRelations = vertices * [&split, &mesh](OpenMesh::VertexHandle vh) {
const auto d = glm::dot(split.normal, mesh.point(vh) - split.origin);
return std::make_pair(vh, d < 0.f ? PlaneRelation::Below : d > 0.f ? PlaneRelation::Above : PlaneRelation::On);
};
// Insert new vertices where half edges intersect the split plane
for (size_t curIdx = 0; curIdx < vertexRelations.size(); ++curIdx) {
const size_t nextIdx = (curIdx + 1) % vertexRelations.size();
const auto ¤t = vertexRelations[curIdx], next = vertexRelations[nextIdx];
if ((current.second == PlaneRelation::Above && next.second == PlaneRelation::Below)
|| (current.second == PlaneRelation::Below && next.second == PlaneRelation::Above)) {
const auto origin = mesh.point(current.first), dir = glm::normalize(mesh.point(next.first) - origin);
float dist {};
glm::intersectRayPlane(origin, dir, split.origin, split.normal, dist);
const auto newv = mesh.add_vertex(origin + (dir * dist));
auto where = vertexRelations.begin();
++curIdx;
std::advance(where, curIdx);
vertexRelations.emplace(where, newv, PlaneRelation::On);
}
}
// Create vertex vectors
std::array<std::vector<OpenMesh::VertexHandle>, 2> out;
auto filterVertices = [&vertexRelations](auto & out, auto notRelation) {
for (const auto & vhr : vertexRelations) {
if (vhr.second != notRelation) {
out.emplace_back(vhr.first);
}
}
};
filterVertices(out.front(), PlaneRelation::Above);
filterVertices(out.back(), PlaneRelation::Below);
if (out.back().size() > 2) {
Shape::CreatedFaces newFaces;
const auto oldName = mesh.property(mesh.nameFaceProperty, fh);
mesh.delete_face(fh);
const auto newf1 = newFaces.insert(mesh.add_namedFace(oldName, out.front()))->second;
const auto newf2 = newFaces.insert(mesh.add_namedFace(name, out.back()))->second;
mesh.copy_property(mesh.smoothFaceProperty, fh, newf1);
mesh.copy_property(mesh.smoothFaceProperty, fh, newf2);
fh = newf1;
return newFaces;
}
return {};
}
bool
FaceController::persist(Persistence::PersistenceStore & store)
{
return STORE_TYPE && STORE_MEMBER(id) && Style::persist(store) && STORE_MEMBER(type) && Mutation::persist(store)
&& STORE_NAME_HELPER("split", splits, Persistence::MapByMember<Splits>)
&& STORE_NAME_HELPER("face", faceControllers, Persistence::MapByMember<FaceControllers>);
}
bool
FaceController::Split::persist(Persistence::PersistenceStore & store)
{
return STORE_TYPE && STORE_MEMBER(id) && STORE_MEMBER(origin) && STORE_MEMBER(normal);
}
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